On August 31, it was learned from the Engineering Technology Research Institute of the Second Oil Production Plant of Henan Oilfield that after the implementation of nitrogen assisted steam huff and puff technology in Well Lou 16281, the peak daily oil production reached 7.5 tons, the daily average oil production was 3.2 tons, and the oil increase was 108 tons.
Well Lou 16281 is located in Jinglou Zone 1, with water content of 73%. The well is exploited in a single layer with an effective thickness of 6.8 m. Due to insufficient formation energy, it is impossible to make the crude oil in some formations flow to the wellhead.
How to make the underground "black gold" flow smoothly? The Second Oil Production Plant gathered its wisdom and soon came up with a golden idea. Engineering and technical personnel implement nitrogen assisted steam huff and puff technology by carrying out reservoir adaptability research, optimizing injection and production parameters. This technology takes advantage of the high expansion coefficient and compression coefficient of nitrogen. Injecting a certain amount of nitrogen during steam huff and puff can effectively supplement the formation energy, maintain the pressure, drive the rapid return of crude oil in the formation, and extend the huff and puff cycle. In the first ten days of June, technicians optimized and implemented the nitrogen assisted steam huff and puff technology for Lou 16281 well, and achieved good results.
The oil wells with "high-quality gas" are full of energy. Since the beginning of the year, the plant has implemented nitrogen assisted steam huff and puff technology for 946 wells, with a stage increase of 45903 tons of oil.